The nearest, South America's Santa Maria, was only fifty miles away...Farther away, the University of Astrograde's Lebedev looked like a Maltese cross; the sails that formed the four arms could apparently be tilted for steering purposes.
【单选题】Lesson 22 Part I Warming-up Exercises Training Focus : Identifying numbers with four to six digits Directions : This drill is for practice in writing umbers with four to six digits. For easy reading a...